New
The measurements of something, like how long, wide, or tall it is.
Dimensions
How long something is.
Length
Flat shapes like circles, squares, and triangles.
Plane Figures
A shape with four equal sides and four corners.
Square
A 3D shape with two matching ends and flat sides.
Prism
Breaking a big shape or number into smaller, easier parts.
Decomposing
How wide something is.
Width
A flat, closed shape with straight sides.
Polygon
A shape with four sides where opposite sides are the same length and all corners are square.
Rectangle
When two shapes are the same size and shape.
Congruent
A shape made by combining two or more smaller shapes.
Composite Figures
Small squares used to measure area.
Square Units
A shape that has length, width, and height, like a box.
Three-Dimensional
The bottom of a shape or the side we measure the height from.
Base
How tall something is, measured from the bottom (base) to the top.
Height
A flat pattern that you can fold to make a 3D shape.
Net
How much space a shape covers.
Area
Two lines that never cross and stay the same distance apart.
Parallel Lines
A shape with four sides where one pair of sides is parallel (never crossing).
Trapezoid
A 3D shape with a base and triangular sides that meet at a point.
Pyramids
The total area of all the sides of a 3D shape.
Surface Area
Any shape with four sides.
Quadrilateral
The straight lines where two sides of a shape meet.
Edges
A shape with four sides where opposite sides are the same length and never cross each other.
Parallelogram
The flat sides of a 3D shape.
Faces
The sides of a 3D shape, not including the top or bottom.
Lateral Faces
Two lines that meet to make a square corner.
Perpendicular
The corners where edges meet.
Vertices
A triangle with one square corner.
Right Triangle
Two lines that stay the same distance apart and never cross.
Parallel